Punching-machine



PAIITENTED JAN. 26, 1904.

0. P. WOODBURN. PUNCHING MACHINE.

APPLIOATION FILED MAY 16, 1903.

2 SHEETS-SHEET 1.

N0 MODEL.

W/ TNESSES:

m: noflms Pawns co Wow-Luna, WASNINOTON. n. c.

PATENTED JAN. 26,1904.

0. P.- WOOD BURN. PUNCHING MACHINE.

APPLIUATION FILED MAY 16, 1903.

2 SHEETS-SHEET Z.

INVENTOH ajvaz" )ldzuvv By W A TTORNE rs.

WITNESSES:

UNITED STATES Patented January 26, 1904.

OSCAR P. WOODBURN, OF PIERCE, TEXAS.

PUNOHlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 750,746, dated January26, 1904.

Application filed May 16, 1903. Serial No. 157,395. (No model.) 7

T0 aZZ whom it may concern:

Be it known that I, OSCAR P. -WooDEURn, a citizen of the United States,and a resident of Pierce, in the county of WVharton and State of Texas,have invented a new and Improved Punching-Machine, of which thefollowing is a full, clear, and exact description.

he object of the invention is to provide a new and improvedpunching-machine more especially designed for punching holes in hollowbodiessuch as pipes, casings, and the like and arranged to punch theholes from the inside of the hollow bodies in a very simple andeconomical manner.

The invention consists of novel features and parts and combinations ofthe same, as will be more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a plan view of the improvement. Fig. 2 is aside elevation ofthe same. Fig. 3 is alongitudinal central sectional elevation of theimprovement. Fig. 4 is an end elevation of the same, and Fig. 5 is anenlarged cross-section of the same on the line 5 5 of Fig. 3.

On a suitably-constructed base A is secured a frame or head B, carryinga support O, preferably of tubular shape and of an external diametercorresponding approximately to the internal diameter of the hollow bodyD, to be provided with holes and slipped onto the free end of the saidsupport C, as plainly indicated in Fig. 3. The holes are punched intothe hollow body D while on the support (1 from the inside thereof, andfor this purpose one or more punches E are provided, as shown, twolocated diametrically opposite each other on the top and bottom of thesupport O and extending through apertures therein, and the said punchesoperate in conjunction with dies F, having their openings in alinementwith the punches E, and the said dies Ffit on the outside of the hollowbody D, as plainly indicated in the drawings.

The punches E are preferably held projected from punch-plates E, havingspring-arms E riveted or otherwise fastened to the inside of the supportC, so as to allow the punch-plates E and the punches E to yield whilespreading the punch-plates apart by the use of a wedge Gr, extendingbetween the punch-plates and engaging angular surfaces thereof, asplainly shown in Fig. 3. Roller-bearings or the like may be interposedbetween the contacting surfaces of the wedge G and the punchplates E, soas to reduce the frictional contact between the wedge and thepunch-plates to a minimum.

The wedge G is secured at its apex end to a rod G, attached to across-head H, mounted to reciprocate in the support O, and the saidcross-head H is'connected by a pitman I with the crank-arm J of a shaftJ, extending transversely and journaled in suitable bearings in the headB.

On one end of the shaft J is secured a gearwheel J 2 in mesh with apinion J secured on the main shaft J journaled on the head B andcarrying fast and loose pulleys J connected by belt J 6 with othermachinery for imparting a continuous rotary motion to the main shaft JWhen the rotation of the latter causes the pinion J 75 and gear-wheel Jto rotate, the shaft J by the crank-arm J, pitrnan I, cross-head H, androd Gr imparts a reciprocating motion to the wedge Gr, so that thelatter moves the punch-plates E apart on the forward stroke of thecross-head H to cause the punches E to engage and punch holes in thewalls of the hollow body D. On the return stroke of the cross-head H thewedge Gr moves outward, and thereby allows the springarms E to returnthe punch-plates E and punches E to their normal innermost position.

WVhen the punches E are withdrawnthat is, are in an innermost positionat the time the wedge G is in an outermost positionthen the hollow bodyD is shifted on the support O to bring the hollow body in properposition for the punches to punch the next holes at the proper points.

The lowermost die F is held on a saddle K, attached to the base A, andthe outermost die F is secured in a yoke K, pivoted at one end on thesaddle K and connected at its free end by a link L with a lever L,fulcrumed on the saddle K and pivotally connected with a rod N, mountedto slide at its forward end in a bearing N, attached to the head B. Theextreme forward end of the rod N carries a friction-roller N engaging acam O, secured on the shaft J, so that when the latter is rotated thesaid cam imparts a forward-and-backward sliding motion to the rod N toimpart a swinging motion to the lever L, which by the link L imparts anup-and-down swinging motion to the yoke K, pivoted on the saddle K.

Now when the punches E move outwardly for punching the apertures in thehollow body D then the yoke K is caused to swing downward, so as tobring the uppermost die F in firm contact with the hollow body D topress the latter also in firm contact with the lowermost die F, therebyholding the dies firmly clamped on the hollow body during the time thepunches E punch the holes in the hollow body.

When the wedge G is on the return stroke for releasing the punches E,then the yoke K is caused to swing upward to release the hollow body D,and thereby permit the operator to shift the same for the purposepreviously described.

I do not limit myself to the particular construction of the individualmechanisms and parts shown and described, as the same may be variedwithout deviating from the spirit of my invention.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. A punching-machine comprising a support for thearticle to be punched, an inside punch in the support, movable outward,to punch the article from the inside, and a die on the outside of thearticle, in alinement with the inside punch, as set forth.

2. A punching-machine comprising a'support for the article to bepunched, an inside punch in the support, movable outward, to punch thearticle from the inside, a die on the outside of the article, inalinement with the inside punch, and means for automatically locking thedie in place on the article, as set forth.

3. A punching-machine comprising a hollow support, over which thearticle to be punched is slipped, inside punches within the support,movable outward to punch the article from the inside, and dies on theoutside of the article, in alinement with the inside punches, as setforth. I

i. A punching-machine comprising a hollo support, over which the articleto be punched is slipped, inside punches within the support, movableoutward to punch the article from the inside, dies on the outside of thearticle, in alinement with the inside punches, and

6. A punching-machine comprising a hollow cylindrical support, overwhich the article to be punched is shifted, a plurality of punchesinside of the said support and arranged opposite each other, to punchthe article from the inside, spring-supported punch-plates carrying thesaid punches, and a reciprocating wedge between the said punch-platesfor moving the same in opposite directions, to cause the punches topunch the article, as set forth.

7. A punching-machine comprising a hollow cylindrical support, overwhich the article to be punched is shifted, a plurality of punchesinside of the said support and arranged opposite each other, to punchthe article from the inside, spring-supported punch-plates carrying thesaid punches, a reciprocating wedge between the said punch-plates formoving the same in opposite directions, to cause the punches to punchthe article, dies for engaging the outside of the article to be punchedand arranged in alinement with the said punches, a saddle for carryingone of the dies, and a yoke hinged on the saddle and carrying the otherdie, the yoke having an up-and-down swinging movement, to move the diesin and out of engagement With the article to be punched, as set forth.

8. A punching-machine comprising a hollow cylindrical support, overwhich the article to be punched is shifted, a plurality of punchesinside of the said support and arranged opposite each other, to punchthe article from the inside, spring-supported punch-plates carrying thesaid punches, a reclprocatlng wedge between the said punch-plates, formoving the same in opposite directions, to cause the punches to punchthe article, dies for engaging the outside of the article to be punchedand arranged in alinement with the said punches, a saddle for carryingone of the dies, a yoke hinged on the saddle and carrying the other die,the yoke having an up-and-down swinging movement, to move the dies inand out of engagement with the article to be punched, and means,substantially as described, for simultaneously actuating the said wedgeand the said yoke, as set forth.

9. A punching-machine, comprising an apertured support, anoutwardly-movable punch in the support, means for moving the punchoutward through the aperture of the support,

and a die outside of the support and between which and the said supportthe article to be punched is adapted to be passed, as set forth.

10. A punching-machine, comprising a hollow apertured support,aspring-pressed punch arranged in the hollow support, means for movingthe punch outward through the aperture of the support, and a die outsideof the support and between which and the said support the article to bepunched is adapted to be I0 passed, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of the two subscribing witnesses.

OSCAR P. WOODBURN. Witnesses:

F. E. USTYNEK, GILBERT CHILD.

